I can't recall the exact number, but the compressor is in play until about 42 me thinks. The grand masters of the list will provide the exact number I'm sure. Charlie On Oct 25, 2004, at 10:08 PM, Jason Bass wrote: > It's 47 > outside and I set the temp to 80. The engine temp was > not hot enough to trigger the fan. Does the ac always > run when the cc is set to auto?